drivers/net/wireless/prism54/islpci_dev.c

   1 /*
   2  *  Copyright (C) 2002 Intersil Americas Inc.
   3  *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   4  *  Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23
  24 #include <linux/netdevice.h>
  25 #include <linux/ethtool.h>
  26 #include <linux/pci.h>
  27 #include <linux/sched.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/delay.h>
  30 #include <linux/if_arp.h>
  31
  32 #include <asm/io.h>
  33
  34 #include "prismcompat.h"
  35 #include "isl_38xx.h"
  36 #include "isl_ioctl.h"
  37 #include "islpci_dev.h"
  38 #include "islpci_mgt.h"
  39 #include "islpci_eth.h"
  40 #include "oid_mgt.h"
  41
  42 #define ISL3877_IMAGE_FILE      "isl3877"
  43 #define ISL3886_IMAGE_FILE      "isl3886"
  44 #define ISL3890_IMAGE_FILE      "isl3890"
  45 MODULE_FIRMWARE(ISL3877_IMAGE_FILE);
  46 MODULE_FIRMWARE(ISL3886_IMAGE_FILE);
  47 MODULE_FIRMWARE(ISL3890_IMAGE_FILE);
  48
  49 static int prism54_bring_down(islpci_private *);
  50 static int islpci_alloc_memory(islpci_private *);
  51
  52 /* Temporary dummy MAC address to use until firmware is loaded.
  53  * The idea there is that some tools (such as nameif) may query
  54  * the MAC address before the netdev is 'open'. By using a valid
  55  * OUI prefix, they can process the netdev properly.
  56  * Of course, this is not the final/real MAC address. It doesn't
  57  * matter, as you are suppose to be able to change it anytime via
  58  * ndev->set_mac_address. Jean II */
  59 static const unsigned char      dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  60
  61 static int
  62 isl_upload_firmware(islpci_private *priv)
  63 {
  64         u32 reg, rc;
  65         void __iomem *device_base = priv->device_base;
  66
  67         /* clear the RAMBoot and the Reset bit */
  68         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  69         reg &= ~ISL38XX_CTRL_STAT_RESET;
  70         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  71         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  72         wmb();
  73         udelay(ISL38XX_WRITEIO_DELAY);
  74
  75         /* set the Reset bit without reading the register ! */
  76         reg |= ISL38XX_CTRL_STAT_RESET;
  77         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  78         wmb();
  79         udelay(ISL38XX_WRITEIO_DELAY);
  80
  81         /* clear the Reset bit */
  82         reg &= ~ISL38XX_CTRL_STAT_RESET;
  83         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  84         wmb();
  85
  86         /* wait a while for the device to reboot */
  87         mdelay(50);
  88
  89         {
  90                 const struct firmware *fw_entry = NULL;
  91                 long fw_len;
  92                 const u32 *fw_ptr;
  93
  94                 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  95                 if (rc) {
  96                         printk(KERN_ERR
  97                                "%s: request_firmware() failed for '%s'\n",
  98                                "prism54", priv->firmware);
  99                         return rc;
 100                 }
 101                 /* prepare the Direct Memory Base register */
 102                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
 103
 104                 fw_ptr = (u32 *) fw_entry->data;
 105                 fw_len = fw_entry->size;
 106
 107                 if (fw_len % 4) {
 108                         printk(KERN_ERR
 109                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 110                                "prism54", priv->firmware);
 111                         release_firmware(fw_entry);
 112                         return -EILSEQ; /* Illegal byte sequence  */;
 113                 }
 114
 115                 while (fw_len > 0) {
 116                         long _fw_len =
 117                             (fw_len >
 118                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 119                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 120                         u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 121
 122                         /* set the card's base address for writing the data */
 123                         isl38xx_w32_flush(device_base, reg,
 124                                           ISL38XX_DIR_MEM_BASE_REG);
 125                         wmb();  /* be paranoid */
 126
 127                         /* increment the write address for next iteration */
 128                         reg += _fw_len;
 129                         fw_len -= _fw_len;
 130
 131                         /* write the data to the Direct Memory Window 32bit-wise */
 132                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 133                         while (_fw_len > 0) {
 134                                 /* use non-swapping writel() */
 135                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 136                                 fw_ptr++, dev_fw_ptr++;
 137                                 _fw_len -= 4;
 138                         }
 139
 140                         /* flush PCI posting */
 141                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 142                         wmb();  /* be paranoid again */
 143
 144                         BUG_ON(_fw_len != 0);
 145                 }
 146
 147                 BUG_ON(fw_len != 0);
 148
 149                 /* Firmware version is at offset 40 (also for "newmac") */
 150                 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 151                        priv->ndev->name, fw_entry->data + 40);
 152
 153                 release_firmware(fw_entry);
 154         }
 155
 156         /* now reset the device
 157          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 158         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 159         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 160         reg &= ~ISL38XX_CTRL_STAT_RESET;
 161         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 162         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 163         wmb();
 164         udelay(ISL38XX_WRITEIO_DELAY);
 165
 166         /* set the reset bit latches the host override and RAMBoot bits
 167          * into the device for operation when the reset bit is reset */
 168         reg |= ISL38XX_CTRL_STAT_RESET;
 169         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 170         /* don't do flush PCI posting here! */
 171         wmb();
 172         udelay(ISL38XX_WRITEIO_DELAY);
 173
 174         /* clear the reset bit should start the whole circus */
 175         reg &= ~ISL38XX_CTRL_STAT_RESET;
 176         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 177         /* don't do flush PCI posting here! */
 178         wmb();
 179         udelay(ISL38XX_WRITEIO_DELAY);
 180
 181         return 0;
 182 }
 183
 184 /******************************************************************************
 185     Device Interrupt Handler
 186 ******************************************************************************/
 187
 188 irqreturn_t
 189 islpci_interrupt(int irq, void *config)
 190 {
 191         u32 reg;
 192         islpci_private *priv = config;
 193         struct net_device *ndev = priv->ndev;
 194         void __iomem *device = priv->device_base;
 195         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 196
 197         /* lock the interrupt handler */
 198         spin_lock(&priv->slock);
 199
 200         /* received an interrupt request on a shared IRQ line
 201          * first check whether the device is in sleep mode */
 202         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 203         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 204                 /* device is in sleep mode, IRQ was generated by someone else */
 205         {
 206 #if VERBOSE > SHOW_ERROR_MESSAGES
 207                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 208 #endif
 209                 spin_unlock(&priv->slock);
 210                 return IRQ_NONE;
 211         }
 212
 213
 214         /* check whether there is any source of interrupt on the device */
 215         reg = readl(device + ISL38XX_INT_IDENT_REG);
 216
 217         /* also check the contents of the Interrupt Enable Register, because this
 218          * will filter out interrupt sources from other devices on the same irq ! */
 219         reg &= readl(device + ISL38XX_INT_EN_REG);
 220         reg &= ISL38XX_INT_SOURCES;
 221
 222         if (reg != 0) {
 223                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 224                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 225
 226                 /* reset the request bits in the Identification register */
 227                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 228
 229 #if VERBOSE > SHOW_ERROR_MESSAGES
 230                 DEBUG(SHOW_FUNCTION_CALLS,
 231                       "IRQ: Identification register 0x%p 0x%x\n", device, reg);
 232 #endif
 233
 234                 /* check for each bit in the register separately */
 235                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 236 #if VERBOSE > SHOW_ERROR_MESSAGES
 237                         /* Queue has been updated */
 238                         DEBUG(SHOW_TRACING, "IRQ: Update flag\n");
 239
 240                         DEBUG(SHOW_QUEUE_INDEXES,
 241                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 242                               le32_to_cpu(priv->control_block->
 243                                           driver_curr_frag[0]),
 244                               le32_to_cpu(priv->control_block->
 245                                           driver_curr_frag[1]),
 246                               le32_to_cpu(priv->control_block->
 247                                           driver_curr_frag[2]),
 248                               le32_to_cpu(priv->control_block->
 249                                           driver_curr_frag[3]),
 250                               le32_to_cpu(priv->control_block->
 251                                           driver_curr_frag[4]),
 252                               le32_to_cpu(priv->control_block->
 253                                           driver_curr_frag[5])
 254                             );
 255
 256                         DEBUG(SHOW_QUEUE_INDEXES,
 257                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 258                               le32_to_cpu(priv->control_block->
 259                                           device_curr_frag[0]),
 260                               le32_to_cpu(priv->control_block->
 261                                           device_curr_frag[1]),
 262                               le32_to_cpu(priv->control_block->
 263                                           device_curr_frag[2]),
 264                               le32_to_cpu(priv->control_block->
 265                                           device_curr_frag[3]),
 266                               le32_to_cpu(priv->control_block->
 267                                           device_curr_frag[4]),
 268                               le32_to_cpu(priv->control_block->
 269                                           device_curr_frag[5])
 270                             );
 271 #endif
 272
 273                         /* cleanup the data low transmit queue */
 274                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 275
 276                         /* device is in active state, update the
 277                          * powerstate flag if necessary */
 278                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 279
 280                         /* check all three queues in priority order
 281                          * call the PIMFOR receive function until the
 282                          * queue is empty */
 283                         if (isl38xx_in_queue(priv->control_block,
 284                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 285 #if VERBOSE > SHOW_ERROR_MESSAGES
 286                                 DEBUG(SHOW_TRACING,
 287                                       "Received frame in Management Queue\n");
 288 #endif
 289                                 islpci_mgt_receive(ndev);
 290
 291                                 islpci_mgt_cleanup_transmit(ndev);
 292
 293                                 /* Refill slots in receive queue */
 294                                 islpci_mgmt_rx_fill(ndev);
 295
 296                                 /* no need to trigger the device, next
 297                                    islpci_mgt_transaction does it */
 298                         }
 299
 300                         while (isl38xx_in_queue(priv->control_block,
 301                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 302 #if VERBOSE > SHOW_ERROR_MESSAGES
 303                                 DEBUG(SHOW_TRACING,
 304                                       "Received frame in Data Low Queue\n");
 305 #endif
 306                                 islpci_eth_receive(priv);
 307                         }
 308
 309                         /* check whether the data transmit queues were full */
 310                         if (priv->data_low_tx_full) {
 311                                 /* check whether the transmit is not full anymore */
 312                                 if (ISL38XX_CB_TX_QSIZE -
 313                                     isl38xx_in_queue(priv->control_block,
 314                                                      ISL38XX_CB_TX_DATA_LQ) >=
 315                                     ISL38XX_MIN_QTHRESHOLD) {
 316                                         /* nope, the driver is ready for more network frames */
 317                                         netif_wake_queue(priv->ndev);
 318
 319                                         /* reset the full flag */
 320                                         priv->data_low_tx_full = 0;
 321                                 }
 322                         }
 323                 }
 324
 325                 if (reg & ISL38XX_INT_IDENT_INIT) {
 326                         /* Device has been initialized */
 327 #if VERBOSE > SHOW_ERROR_MESSAGES
 328                         DEBUG(SHOW_TRACING,
 329                               "IRQ: Init flag, device initialized\n");
 330 #endif
 331                         wake_up(&priv->reset_done);
 332                 }
 333
 334                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 335                         /* Device intends to move to powersave state */
 336 #if VERBOSE > SHOW_ERROR_MESSAGES
 337                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n");
 338 #endif
 339                         isl38xx_handle_sleep_request(priv->control_block,
 340                                                      &powerstate,
 341                                                      priv->device_base);
 342                 }
 343
 344                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 345                         /* Device has been woken up to active state */
 346 #if VERBOSE > SHOW_ERROR_MESSAGES
 347                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n");
 348 #endif
 349
 350                         isl38xx_handle_wakeup(priv->control_block,
 351                                               &powerstate, priv->device_base);
 352                 }
 353         } else {
 354 #if VERBOSE > SHOW_ERROR_MESSAGES
 355                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 356 #endif
 357                 spin_unlock(&priv->slock);
 358                 return IRQ_NONE;
 359         }
 360
 361         /* sleep -> ready */
 362         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 363             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 364                 islpci_set_state(priv, PRV_STATE_READY);
 365
 366         /* !sleep -> sleep */
 367         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 368             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 369                 islpci_set_state(priv, PRV_STATE_SLEEP);
 370
 371         /* unlock the interrupt handler */
 372         spin_unlock(&priv->slock);
 373
 374         return IRQ_HANDLED;
 375 }
 376
 377 /******************************************************************************
 378     Network Interface Control & Statistical functions
 379 ******************************************************************************/
 380 static int
 381 islpci_open(struct net_device *ndev)
 382 {
 383         u32 rc;
 384         islpci_private *priv = netdev_priv(ndev);
 385
 386         /* reset data structures, upload firmware and reset device */
 387         rc = islpci_reset(priv,1);
 388         if (rc) {
 389                 prism54_bring_down(priv);
 390                 return rc; /* Returns informative message */
 391         }
 392
 393         netif_start_queue(ndev);
 394
 395         /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
 396          * once the firmware receives a trap of being associated
 397          * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
 398          * should just leave the carrier on as its expected the firmware
 399          * won't send us a trigger. */
 400         if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
 401                 netif_carrier_off(ndev);
 402         else
 403                 netif_carrier_on(ndev);
 404
 405         return 0;
 406 }
 407
 408 static int
 409 islpci_close(struct net_device *ndev)
 410 {
 411         islpci_private *priv = netdev_priv(ndev);
 412
 413         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 414
 415         netif_stop_queue(ndev);
 416
 417         return prism54_bring_down(priv);
 418 }
 419
 420 static int
 421 prism54_bring_down(islpci_private *priv)
 422 {
 423         void __iomem *device_base = priv->device_base;
 424         u32 reg;
 425         /* we are going to shutdown the device */
 426         islpci_set_state(priv, PRV_STATE_PREBOOT);
 427
 428         /* disable all device interrupts in case they weren't */
 429         isl38xx_disable_interrupts(priv->device_base);
 430
 431         /* For safety reasons, we may want to ensure that no DMA transfer is
 432          * currently in progress by emptying the TX and RX queues. */
 433
 434         /* wait until interrupts have finished executing on other CPUs */
 435         synchronize_irq(priv->pdev->irq);
 436
 437         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 438         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 439         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 440         wmb();
 441         udelay(ISL38XX_WRITEIO_DELAY);
 442
 443         reg |= ISL38XX_CTRL_STAT_RESET;
 444         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 445         wmb();
 446         udelay(ISL38XX_WRITEIO_DELAY);
 447
 448         /* clear the Reset bit */
 449         reg &= ~ISL38XX_CTRL_STAT_RESET;
 450         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 451         wmb();
 452
 453         /* wait a while for the device to reset */
 454         schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 455
 456         return 0;
 457 }
 458
 459 static int
 460 islpci_upload_fw(islpci_private *priv)
 461 {
 462         islpci_state_t old_state;
 463         u32 rc;
 464
 465         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 466
 467         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 468
 469         rc = isl_upload_firmware(priv);
 470         if (rc) {
 471                 /* error uploading the firmware */
 472                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 473                        priv->ndev->name, priv->firmware);
 474
 475                 islpci_set_state(priv, old_state);
 476                 return rc;
 477         }
 478
 479         printk(KERN_DEBUG "%s: firmware upload complete\n",
 480                priv->ndev->name);
 481
 482         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 483
 484         return 0;
 485 }
 486
 487 static int
 488 islpci_reset_if(islpci_private *priv)
 489 {
 490         long remaining;
 491         int result = -ETIME;
 492         int count;
 493
 494         DEFINE_WAIT(wait);
 495         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 496
 497         /* now the last step is to reset the interface */
 498         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 499         islpci_set_state(priv, PRV_STATE_PREINIT);
 500
 501         for(count = 0; count < 2 && result; count++) {
 502                 /* The software reset acknowledge needs about 220 msec here.
 503                  * Be conservative and wait for up to one second. */
 504
 505                 remaining = schedule_timeout_uninterruptible(HZ);
 506
 507                 if(remaining > 0) {
 508                         result = 0;
 509                         break;
 510                 }
 511
 512                 /* If we're here it's because our IRQ hasn't yet gone through.
 513                  * Retry a bit more...
 514                  */
 515                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 516                         priv->ndev->name);
 517         }
 518
 519         finish_wait(&priv->reset_done, &wait);
 520
 521         if (result) {
 522                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 523                 return result;
 524         }
 525
 526         islpci_set_state(priv, PRV_STATE_INIT);
 527
 528         /* Now that the device is 100% up, let's allow
 529          * for the other interrupts --
 530          * NOTE: this is not *yet* true since we've only allowed the
 531          * INIT interrupt on the IRQ line. We can perhaps poll
 532          * the IRQ line until we know for sure the reset went through */
 533         isl38xx_enable_common_interrupts(priv->device_base);
 534
 535         down_write(&priv->mib_sem);
 536         result = mgt_commit(priv);
 537         if (result) {
 538                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 539                 up_write(&priv->mib_sem);
 540                 return result;
 541         }
 542         up_write(&priv->mib_sem);
 543
 544         islpci_set_state(priv, PRV_STATE_READY);
 545
 546         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 547         return 0;
 548 }
 549
 550 int
 551 islpci_reset(islpci_private *priv, int reload_firmware)
 552 {
 553         isl38xx_control_block *cb =    /* volatile not needed */
 554                 (isl38xx_control_block *) priv->control_block;
 555         unsigned counter;
 556         int rc;
 557
 558         if (reload_firmware)
 559                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 560         else
 561                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 562
 563         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 564
 565         /* disable all device interrupts in case they weren't */
 566         isl38xx_disable_interrupts(priv->device_base);
 567
 568         /* flush all management queues */
 569         priv->index_mgmt_tx = 0;
 570         priv->index_mgmt_rx = 0;
 571
 572         /* clear the indexes in the frame pointer */
 573         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 574                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 575                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 576         }
 577
 578         /* reset the mgmt receive queue */
 579         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 580                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 581                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 582                 frag->flags = 0;
 583                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 584         }
 585
 586         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 587                 cb->rx_data_low[counter].address =
 588                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 589         }
 590
 591         /* since the receive queues are filled with empty fragments, now we can
 592          * set the corresponding indexes in the Control Block */
 593         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 594             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 595         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 596             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 597
 598         /* reset the remaining real index registers and full flags */
 599         priv->free_data_rx = 0;
 600         priv->free_data_tx = 0;
 601         priv->data_low_tx_full = 0;
 602
 603         if (reload_firmware) { /* Should we load the firmware ? */
 604         /* now that the data structures are cleaned up, upload
 605          * firmware and reset interface */
 606                 rc = islpci_upload_fw(priv);
 607                 if (rc) {
 608                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 609                                 priv->ndev->name);
 610                         return rc;
 611                 }
 612         }
 613
 614         /* finally reset interface */
 615         rc = islpci_reset_if(priv);
 616         if (rc)
 617                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 618         return rc;
 619 }
 620
 621 /******************************************************************************
 622     Network device configuration functions
 623 ******************************************************************************/
 624 static int
 625 islpci_alloc_memory(islpci_private *priv)
 626 {
 627         int counter;
 628
 629 #if VERBOSE > SHOW_ERROR_MESSAGES
 630         printk(KERN_DEBUG "islpci_alloc_memory\n");
 631 #endif
 632
 633         /* remap the PCI device base address to accessible */
 634         if (!(priv->device_base =
 635               ioremap(pci_resource_start(priv->pdev, 0),
 636                       ISL38XX_PCI_MEM_SIZE))) {
 637                 /* error in remapping the PCI device memory address range */
 638                 printk(KERN_ERR "PCI memory remapping failed\n");
 639                 return -1;
 640         }
 641
 642         /* memory layout for consistent DMA region:
 643          *
 644          * Area 1: Control Block for the device interface
 645          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 646          *         the number of supported stations in the AP determines the minimal
 647          *         size of the buffer !
 648          */
 649
 650         /* perform the allocation */
 651         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 652                                                         HOST_MEM_BLOCK,
 653                                                         &priv->
 654                                                         device_host_address);
 655
 656         if (!priv->driver_mem_address) {
 657                 /* error allocating the block of PCI memory */
 658                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 659                        "prism54");
 660                 return -1;
 661         }
 662
 663         /* assign the Control Block to the first address of the allocated area */
 664         priv->control_block =
 665             (isl38xx_control_block *) priv->driver_mem_address;
 666
 667         /* set the Power Save Buffer pointer directly behind the CB */
 668         priv->device_psm_buffer =
 669                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 670
 671         /* make sure all buffer pointers are initialized */
 672         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 673                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 674                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 675         }
 676
 677         priv->index_mgmt_rx = 0;
 678         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 679         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 680
 681         /* allocate rx queue for management frames */
 682         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 683                 goto out_free;
 684
 685         /* now get the data rx skb's */
 686         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 687         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 688
 689         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 690                 struct sk_buff *skb;
 691
 692                 /* allocate an sk_buff for received data frames storage
 693                  * each frame on receive size consists of 1 fragment
 694                  * include any required allignment operations */
 695                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 696                         /* error allocating an sk_buff structure elements */
 697                         printk(KERN_ERR "Error allocating skb.\n");
 698                         skb = NULL;
 699                         goto out_free;
 700                 }
 701                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 702                 /* add the new allocated sk_buff to the buffer array */
 703                 priv->data_low_rx[counter] = skb;
 704
 705                 /* map the allocated skb data area to pci */
 706                 priv->pci_map_rx_address[counter] =
 707                     pci_map_single(priv->pdev, (void *) skb->data,
 708                                    MAX_FRAGMENT_SIZE_RX + 2,
 709                                    PCI_DMA_FROMDEVICE);
 710                 if (!priv->pci_map_rx_address[counter]) {
 711                         /* error mapping the buffer to device
 712                            accessible memory address */
 713                         printk(KERN_ERR "failed to map skb DMA'able\n");
 714                         goto out_free;
 715                 }
 716         }
 717
 718         prism54_acl_init(&priv->acl);
 719         prism54_wpa_bss_ie_init(priv);
 720         if (mgt_init(priv))
 721                 goto out_free;
 722
 723         return 0;
 724  out_free:
 725         islpci_free_memory(priv);
 726         return -1;
 727 }
 728
 729 int
 730 islpci_free_memory(islpci_private *priv)
 731 {
 732         int counter;
 733
 734         if (priv->device_base)
 735                 iounmap(priv->device_base);
 736         priv->device_base = NULL;
 737
 738         /* free consistent DMA area... */
 739         if (priv->driver_mem_address)
 740                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 741                                     priv->driver_mem_address,
 742                                     priv->device_host_address);
 743
 744         /* clear some dangling pointers */
 745         priv->driver_mem_address = NULL;
 746         priv->device_host_address = 0;
 747         priv->device_psm_buffer = 0;
 748         priv->control_block = NULL;
 749
 750         /* clean up mgmt rx buffers */
 751         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 752                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 753                 if (buf->pci_addr)
 754                         pci_unmap_single(priv->pdev, buf->pci_addr,
 755                                          buf->size, PCI_DMA_FROMDEVICE);
 756                 buf->pci_addr = 0;
 757                 kfree(buf->mem);
 758                 buf->size = 0;
 759                 buf->mem = NULL;
 760         }
 761
 762         /* clean up data rx buffers */
 763         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 764                 if (priv->pci_map_rx_address[counter])
 765                         pci_unmap_single(priv->pdev,
 766                                          priv->pci_map_rx_address[counter],
 767                                          MAX_FRAGMENT_SIZE_RX + 2,
 768                                          PCI_DMA_FROMDEVICE);
 769                 priv->pci_map_rx_address[counter] = 0;
 770
 771                 if (priv->data_low_rx[counter])
 772                         dev_kfree_skb(priv->data_low_rx[counter]);
 773                 priv->data_low_rx[counter] = NULL;
 774         }
 775
 776         /* Free the access control list and the WPA list */
 777         prism54_acl_clean(&priv->acl);
 778         prism54_wpa_bss_ie_clean(priv);
 779         mgt_clean(priv);
 780
 781         return 0;
 782 }
 783
 784 #if 0
 785 static void
 786 islpci_set_multicast_list(struct net_device *dev)
 787 {
 788         /* put device into promisc mode and let network layer handle it */
 789 }
 790 #endif
 791
 792 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
 793                                        struct ethtool_drvinfo *info)
 794 {
 795         strcpy(info->driver, DRV_NAME);
 796         strcpy(info->version, DRV_VERSION);
 797 }
 798
 799 static const struct ethtool_ops islpci_ethtool_ops = {
 800         .get_drvinfo = islpci_ethtool_get_drvinfo,
 801 };
 802
 803 static const struct net_device_ops islpci_netdev_ops = {
 804         .ndo_open               = islpci_open,
 805         .ndo_stop               = islpci_close,
 806         .ndo_do_ioctl           = prism54_ioctl,
 807         .ndo_start_xmit         = islpci_eth_transmit,
 808         .ndo_tx_timeout         = islpci_eth_tx_timeout,
 809         .ndo_set_mac_address    = prism54_set_mac_address,
 810         .ndo_change_mtu         = eth_change_mtu,
 811         .ndo_validate_addr      = eth_validate_addr,
 812 };
 813
 814 struct net_device *
 815 islpci_setup(struct pci_dev *pdev)
 816 {
 817         islpci_private *priv;
 818         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 819
 820         if (!ndev)
 821                 return ndev;
 822
 823         pci_set_drvdata(pdev, ndev);
 824 #if defined(SET_NETDEV_DEV)
 825         SET_NETDEV_DEV(ndev, &pdev->dev);
 826 #endif
 827
 828         /* setup the structure members */
 829         ndev->base_addr = pci_resource_start(pdev, 0);
 830         ndev->irq = pdev->irq;
 831
 832         /* initialize the function pointers */
 833         ndev->netdev_ops = &islpci_netdev_ops;
 834         ndev->wireless_handlers = &prism54_handler_def;
 835         ndev->ethtool_ops = &islpci_ethtool_ops;
 836
 837         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 838         ndev->addr_len = ETH_ALEN;
 839         /* Get a non-zero dummy MAC address for nameif. Jean II */
 840         memcpy(ndev->dev_addr, dummy_mac, 6);
 841
 842         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 843
 844         /* allocate a private device structure to the network device  */
 845         priv = netdev_priv(ndev);
 846         priv->ndev = ndev;
 847         priv->pdev = pdev;
 848         priv->monitor_type = ARPHRD_IEEE80211;
 849         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 850                 priv->monitor_type : ARPHRD_ETHER;
 851
 852         /* Add pointers to enable iwspy support. */
 853         priv->wireless_data.spy_data = &priv->spy_data;
 854         ndev->wireless_data = &priv->wireless_data;
 855
 856         /* save the start and end address of the PCI memory area */
 857         ndev->mem_start = (unsigned long) priv->device_base;
 858         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 859
 860 #if VERBOSE > SHOW_ERROR_MESSAGES
 861         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 862 #endif
 863
 864         init_waitqueue_head(&priv->reset_done);
 865
 866         /* init the queue read locks, process wait counter */
 867         mutex_init(&priv->mgmt_lock);
 868         priv->mgmt_received = NULL;
 869         init_waitqueue_head(&priv->mgmt_wqueue);
 870         mutex_init(&priv->stats_lock);
 871         spin_lock_init(&priv->slock);
 872
 873         /* init state machine with off#1 state */
 874         priv->state = PRV_STATE_OFF;
 875         priv->state_off = 1;
 876
 877         /* initialize workqueue's */
 878         INIT_WORK(&priv->stats_work, prism54_update_stats);
 879         priv->stats_timestamp = 0;
 880
 881         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 882         priv->reset_task_pending = 0;
 883
 884         /* allocate various memory areas */
 885         if (islpci_alloc_memory(priv))
 886                 goto do_free_netdev;
 887
 888         /* select the firmware file depending on the device id */
 889         switch (pdev->device) {
 890         case 0x3877:
 891                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 892                 break;
 893
 894         case 0x3886:
 895                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 896                 break;
 897
 898         default:
 899                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 900                 break;
 901         }
 902
 903         if (register_netdev(ndev)) {
 904                 DEBUG(SHOW_ERROR_MESSAGES,
 905                       "ERROR: register_netdev() failed\n");
 906                 goto do_islpci_free_memory;
 907         }
 908
 909         return ndev;
 910
 911       do_islpci_free_memory:
 912         islpci_free_memory(priv);
 913       do_free_netdev:
 914         pci_set_drvdata(pdev, NULL);
 915         free_netdev(ndev);
 916         priv = NULL;
 917         return NULL;
 918 }
 919
 920 islpci_state_t
 921 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 922 {
 923         islpci_state_t old_state;
 924
 925         /* lock */
 926         old_state = priv->state;
 927
 928         /* this means either a race condition or some serious error in
 929          * the driver code */
 930         switch (new_state) {
 931         case PRV_STATE_OFF:
 932                 priv->state_off++;
 933         default:
 934                 priv->state = new_state;
 935                 break;
 936
 937         case PRV_STATE_PREBOOT:
 938                 /* there are actually many off-states, enumerated by
 939                  * state_off */
 940                 if (old_state == PRV_STATE_OFF)
 941                         priv->state_off--;
 942
 943                 /* only if hw_unavailable is zero now it means we either
 944                  * were in off#1 state, or came here from
 945                  * somewhere else */
 946                 if (!priv->state_off)
 947                         priv->state = new_state;
 948                 break;
 949         }
 950 #if 0
 951         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 952                priv->ndev->name, old_state, new_state, priv->state_off);
 953 #endif
 954
 955         /* invariants */
 956         BUG_ON(priv->state_off < 0);
 957         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 958         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 959
 960         /* unlock */
 961         return old_state;
 962 }